CN107795302B - A kind of Gas Hydrate In Sea Areas decompression quarrying apparatus and its recovery method - Google Patents
A kind of Gas Hydrate In Sea Areas decompression quarrying apparatus and its recovery method Download PDFInfo
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- CN107795302B CN107795302B CN201711009912.5A CN201711009912A CN107795302B CN 107795302 B CN107795302 B CN 107795302B CN 201711009912 A CN201711009912 A CN 201711009912A CN 107795302 B CN107795302 B CN 107795302B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Abstract
The present invention relates to a kind of Gas Hydrate In Sea Areas decompression quarrying apparatus and its recovery methods, including exploitation of gas hydrates well, gas-liquid processing equipment and data acquisition and monitoring equipment；Data acquisition and monitoring device are for monitoring and controlling the liquid level in exploitation of gas hydrates well, temperature, pressure condition and working condition；Setting gas pipeline, infusion pipeline, tail pipe and pot container in exploitation of gas hydrates well；Gas pipeline upper end is connected with gas-liquid processing equipment；Infusion pipeline upper end is coaxially plugged in gas pipeline, is connected after being stretched out by gas pipeline bottom side of the wall with gas-liquid processing equipment；Pot container is arranged in infusion pipeline lower end, drainage and step-down equipment and heating equipment is arranged inside, and drainage and step-down equipment is connected with infusion pipeline and heating equipment respectively, pot container bottom is connected with tail pipe.The present invention can be widely applied in the exploitation of Gas Hydrate In Sea Areas.
Description
Technical field
The invention belongs to energy extraction technical fields, are depressured quarrying apparatus more particularly to a kind of Gas Hydrate In Sea Areas
And its recovery method.
Background technique
With coal and the increasingly reduction of petroleum resources and gradually increasing for people's environmental protection consciousness, development and utilization
Clean energy resource, new energy and renewable energy are more valued by people.As a kind of novel, efficient, clean energy
Carrier, gas hydrates have a very important role for solving the energy depletion crisis that the mankind are faced now.Naturally
Gas hydrate is also known as combustible ice, is that the class ice that natural gas (main component is methane) and water are formed under high pressure and cryogenic conditions is solid
Body compound.Hydrate sediment is distributed widely in the deep water ground environment such as land frozen soil environment and ocean, lake.The day in China
Right gas hydrate reserves very abundant finds that China's natural gas hydrate is mainly distributed on South China Sea, east according to resource exploration
Sea area, Qinghai-Tibet tundra and northeast tundra.
Being all based on destruction natural gas hydrate phase balance emulation condition to the recovery method of gas hydrates at present makes its point
Solution, generally includes voltage drop method, heating, inhibitor method etc..Simple introduction is done to various methods below:
Voltage drop method: it by reducing hydrate layer pressure, makes it below hydrate and balances each other under the conditions of the regional temperature pressure
Power, so that hydrate be made to decompose the process that phase transformation generates methane gas from solid-state.The design and conventional gas and oil of voltage drop method recovery well
Exploit it is close, the preferable hydrate of permeability hide in pressure propagation quickly, therefore, it is considered to be most economical, effective, simply open
Adopt mode.
Heating: the temperature by increasing hydrate formation makes the temperature on stratum be higher than hydrate in the region pore water
Or under the pressure condition of gas Phase Equilibrium Temperature and decompose phase transformation generate methane gas mistake.The main deficiency of heating is to will cause greatly
The thermal loss of amount is gone up in deposit, liquid, gas temperature, costly, low efficiency.
Inhibitor method: by injecting hydrate inhibitor (methanol etc.) in the earth formation, balancing each other for gas hydrate synthesis is improved
Condition, prevent the pore pressure on stratum and temperature condition be from meeting balancing each other for hydrate, so that decomposition of hydrate is mutually sold of one's property
The method giving birth to methane gas and collecting.The disadvantage is that needing a large amount of expensive inhibitor, decomposition of hydrate generates water and dilutes inhibitor
And its effect is reduced, and may cause environmental pollution, and efficiency is not very high.
Currently, it is existing it is a kind of by water pump in the device of gas hydrates drainage and step-down, due to not carrying out gas
Liquid separates, and a large amount of methane gas are dissolved in pumping drainage pipeline, easily generates Hydrate Plugging pipeline again in uplink pipeline,
Cause and stop production, and cannot accurately measure liquid level condition, to adjust electric submersible pump working condition in time.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide one kind to be suitable for Gas Hydrate In Sea Areas mining environment, has
Effect prevents the regenerated Gas Hydrate In Sea Areas decompression quarrying apparatus of hydrate and its recovery method.
To achieve the above object, the present invention takes following technical scheme: a kind of Gas Hydrate In Sea Areas decompression exploitation dress
It sets, it is characterised in that: it includes exploitation of gas hydrates well, gas-liquid processing equipment and data acquisition and monitoring equipment；Institute
It states data acquisition and monitoring device is used to monitor and the liquid level during control production in the exploitation of gas hydrates well, temperature
Spend pressure condition and working condition；Exploitation of gas hydrates well upper end is connected with marine riser, is internally provided with gas transmission
Pipeline, infusion pipeline, tail pipe and the drainage and step-down equipment and heating equipment being arranged in pot container；On the gas pipeline
End is connected after being pierced by by the marine riser with the gas-liquid processing equipment；The infusion pipeline upper end is coaxially plugged in the gas transmission
Lower end of duct enters the inner cavity of the exploitation of gas hydrates well after being stretched out by the gas pipeline bottom side of the wall, and by institute
It states after the infusion pipeline outlet in marine riser bottom outer wall is pierced by and is connected with the gas-liquid processing equipment；On the pot container
Portion's setting in the infusion pipeline lower end outer wall, in the middle part of the pot container and lower part be respectively set the drainage and step-down equipment and
Heating equipment, and the drainage and step-down equipment upper and lower end is connected with the infusion pipeline lower end and heating equipment respectively, the tank
Type container bottom is connected with the tail pipe upper end.
The pot container bottom and the tail pipe connecting place are provided with first inside the exploitation of gas hydrates well
The second packer, the perfusion tube of the water proof bottom of the tube is arranged in packer, the gas pipeline and the infusion pipeline intersection
Pass exit is internally provided with third packer, outside setting preventer；Bottom is extremely in the exploitation of gas hydrates well
It is lower part admission chamber between first packer, is middle part gas-liquid point between first packer and second packer
From chamber, it is gas-liquid conveyor chamber in top between second packer and the third packer, is above the third packer
Marine riser annular space.
The data acquisition and monitoring equipment includes the first packer state sensing being arranged on first packer
Device, the second packer state sensor being arranged on second packer, the third being arranged on the third packer
Packer state sensor, is arranged in the exploitation of gas hydrates bottom-hole transmitter being arranged on the tail pipe side wall
Monitoring device, frequency converter and the power supply device of extraordinary distributed temperature measuring optical fiber and setting across the sea in well；The monitoring
Equipment respectively with the first packer state sensor, the second packer state sensor, third packer state sensor,
Bottom-hole transmitter and extraordinary distributed temperature measuring optical fiber are connected, and receive the measurement data and the extraordinary distribution of each sensor
The temperature measuring data of temperature-measuring optical fiber, and display and data analysis are carried out to the data received, and then control the frequency converter
Realize that liquid level automatic stabilisation is within a preset range in well；The power supply device is the monitoring device and frequency converter and the day
Drainage and step-down equipment and heating equipment power supply in right gas hydrate recovery well.
The special type distributed temperature measuring optical fiber includes spaced heating tape, bare fibre and is arranged in the heating tape
With the protective case outside bare fibre；The metal that the heating tape includes copper conductor and is closely set in outside the copper conductor is compiled
Knitmesh；The bare fibre outer cover is equipped with stainless steel tube, and the bare fibre is filled with the annular space inside the stainless steel tube
Ointment for preventing steam intrusion optical fiber from fibre loss being caused to become larger and increase heat transfer property.
The pot upper vessel portion is fixed on the outer wall of the infusion pipeline lower part by pot container connection strap；Institute
It states and is provided with packer in tank in the middle part of pot container, and be provided on the pot container side wall of packer lower part in the tank
Multiple tank skin through-holes.
The drainage and step-down equipment includes sequentially connected centrifugal pump, centrifugal gas-liquid separator and motor, the centrifugation
Pump upper end is connected to the infusion pipeline lower end, and the motor is connected with the heating equipment.
The centrifugal gas-liquid separator includes the shaft being coaxially arranged, separator inner tube and separator outer tube, and described turn
Axis is connected with the motor, is arranged at intervals with gas discharge outlet on the separator outer tube.
The heating equipment uses electromagnetic heater.
The gas-liquid processing equipment includes produced water treatment device and extraction Flash Gas Compression Skid System, the produced water treatment device
It is connected with external infusion pipeline upper end, the extraction Flash Gas Compression Skid System is connected with the gas pipeline upper end.
A kind of Gas Hydrate In Sea Areas decompression recovery method based on described device, it is characterised in that including following step
It is rapid:
1) controlling precipitation row pressure equipment discharge part liquid by data acquisition and monitoring equipment reduces gas hydrates
Liquid level in recovery well enters exploitation of gas hydrates well after promoting gas hydrates layer to decompose；2) pass through heating equipment pair
Air-water mixture into exploitation of gas hydrates bottom is heated, and is fed them into and is carried out gas-liquid point in pot container
From water and gas after separation respectively enter infusion pipeline and gas pipeline, and then are transported to gas-liquid processing equipment；3) data are adopted
Collection and temperature, pressure and the fluid level condition in hydrate recovery well in monitoring device monitoring hydrate recovery process, and the row of control
Water decompression device, so that liquid level is maintained at preset height in hydrate recovery well；4) gas-liquid processing equipment is to recovered water and extraction
Gas discharges after being handled.
The invention adopts the above technical scheme, which has the following advantages: 1, it is of the invention due to being provided with pot container,
Gas-liquid mixture is entered by pot container bottom, enters outer wall annular space after going upward to its middle part, and turn back from pot container top,
Form the first separation that flow circuits realize gas-liquid mixture；Later, it is realized in the gas-liquid separator in pot container secondary
Separation, effectively increases the efficiency of gas-liquid separation, so that gas-liquid separation is more thorough, reduces the regenerated wind of gas hydrates
Danger.2, the present invention opens gas hydrates due to being provided with first~third packer in exploitation of gas hydrates well
It adopts well and is divided into lower part admission chamber, middle part gas-liquid separation chamber and top gas-liquid conveyor chamber, be conducive to that gas-liquid is guided to shunt, Er Qieshang
Infusion pipeline separates conveying with gas pipeline in portion's gas-liquid conveyor chamber, effectively prevents gas-liquid mixture and opens in gas hydrates
Adopt the regeneration in well.3, the present invention can continue the gas-liquid mixture of wellbore bottom due to being provided with electromagnetic heater
Heating, and be provided with extraordinary distributed temperature measuring optical fiber along pit shaft and also have the function of improving annulus fluid temperature, make pit shaft
Internal gas-liquid mixture temperature is in higher level, further avoids and blocks risk caused by gas hydrates regeneration.
4, the present invention, can be according to the difference of the heating conduction of liquids and gases, accurately due to being provided with extraordinary distributed temperature measuring optical fiber
The height of pit shaft inside liquid level is measured, not flowed to generate to interfere by gas-liquid mixture is influenced, and monitoring device control is improved
Accuracy.5, the present invention is outside drainage and step-down equipment and heating equipment due to being provided with pot container, for each equipment into
Row limit, vibration causes equipment to collide when effectively preventing motor work, while providing during electric submersible pump unit is gone into the well
Protective effect avoids the friction with pipe sleeve inner wall.6, the present invention in exploitation of gas hydrates underground portion admission chamber due to setting
A sand control screens are equipped with, are provided with secondary sand control screens in tail pipe, can effectively avoid sandstone from entering and destroy exploitation in winning apparatus
Equipment improves the safety of winning apparatus.Thus the present invention can be widely applied in Gas Hydrate In Sea Areas exploitation.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of Gas Hydrate In Sea Areas decompression quarrying apparatus of the present invention；
Fig. 2 is the structural schematic diagram of the gas discharge outlet of centrifugal gas-liquid separator of the present invention；
Fig. 3 is extraordinary distributed temperature measuring optical fiber of the invention；
In figure: 1, sea water layer；2, cap rock；3, gas hydrates layer；4, exploitation of gas hydrates well；40, appendix
Road；41, infusion pipeline；42, tail pipe；421, secondary sand control screens；43, pot container；431, pot container connection strap；432, in tank
Packer；433, tank skin through-hole；44, drainage and step-down equipment；441, centrifugal pump；442, centrifugal gas-liquid separator；4421, turn
Axis；4422, separator inner tube；4423, separator outer tube；443, motor；45, heating equipment；46；First packer；47, second
Packer；48, third packer；49, preventer；401, lower part admission chamber；4011, a sand control screens；402, middle part gas-liquid point
From chamber；403, top gas-liquid conveyor chamber；5, marine riser；6, sea；7, gas-liquid processing equipment；71, produced water treatment device；72,
Produce Flash Gas Compression Skid System；8, data acquisition and monitoring equipment；80, the first packer state sensor；81, the second packer state
Sensor；82, third packer state sensor；83, bottom-hole transmitter；831, bottom-hole transmitter cable 831；84, extraordinary point
Cloth temperature-measuring optical fiber；841, heating tape；842, bare fibre；843, protective case；844, copper conductor；845, metal net；846,
Stainless steel tube；847, ointment；85, monitoring device；86, frequency converter；87, power supply device；801, cable protection presss from both sides；802, supply lines
Cable；803, cable is combined；9, bottom.
Specific embodiment
Of the invention is described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of Gas Hydrate In Sea Areas provided by the invention is depressured quarrying apparatus, including from top to bottom according to
It is secondary to exist through the exploitation of gas hydrates well 4 and marine riser 5 of sea water layer 1, cap rock 2 and gas hydrates layer 3 and setting
Gas-liquid processing equipment 7 and data acquisition and monitoring device 8 on sea 6.Marine riser 5 and 4 upper end of exploitation of gas hydrates well
Be connected, data acquisition and monitoring device 8 be used to monitor simultaneously the liquid level during control production in exploitation of gas hydrates well 4,
Temperature, pressure condition and working condition.
4 lower end of exploitation of gas hydrates well is located on bottom 9, be internally provided with gas pipeline 40, infusion pipeline 41,
Tail pipe 42, the pot container 43 of upper opening and the drainage and step-down equipment 44 and heating equipment that are arranged in pot container 43
45.40 upper end of gas pipeline is connected after being pierced by by marine riser 5 with gas-liquid processing equipment 7；41 upper end of infusion pipeline is coaxially plugged in
40 lower end of gas pipeline enters 4 inner cavity of exploitation of gas hydrates well after being stretched out by 40 bottom side of the wall of gas pipeline, and by water proof
Infusion pipeline outlet in 5 bottom outer wall of pipe is connected after being pierced by with gas-liquid processing equipment 7；It is set on 41 lower part outer wall of infusion pipeline
Pot container 43 is set, drainage and step-down equipment 44 and heating equipment 45 is respectively set in 43 middle part of pot container and lower part, and drains drop
Pressure 44 upper and lower end of equipment is connected with 41 lower end of infusion pipeline and heating equipment 45 respectively, on 43 bottom of pot container and tail pipe 42
End is connected.
4 inside pot container of exploitation of gas hydrates well, 43 bottom and 42 connecting place of tail pipe are provided with the first packer
46, gas pipeline 40 and 41 intersection of infusion pipeline are arranged the second packer 47, at the infusion pipeline outlet of 5 bottom of marine riser
It is internally provided with third packer 48, outside is provided with preventer 49.In exploitation of gas hydrates well 4 bottom to first packing
It is lower part admission chamber 401 between device 46, is middle part gas-liquid separation chamber 402 between the first packer 46 and the second packer 47, the
It is top gas-liquid conveyor chamber 403 between two packers 47 and third packer 48, is marine riser annular space above third packer 48.
Drainage and step-down equipment 44 includes sequentially connected centrifugal pump 441, centrifugal gas-liquid separator 442 and motor 443, from
441 upper end of heart pump is connected to 41 lower end of infusion pipeline, and motor 443 is connected with heating equipment 45.
43 top of pot container is fixed on 41 lower part outer wall of infusion pipeline by pot container connection strap 431；Tank
Packer 432 in the tank for separating motor 443 and centrifugal gas-liquid separator 442 is provided in the middle part of type container 43, and in tank
Multiple tank skin through-holes 433 are provided on 44 side wall of pot container of 432 lower part of packer.
Gas-liquid processing equipment 7 includes produced water treatment device 71 and extraction Flash Gas Compression Skid System 72, produced water treatment device 71
It is connected with 41 upper end of infusion pipeline, extraction Flash Gas Compression Skid System 72 is connected with 40 upper end of gas pipeline.
Once sand control screens 4011 are set on 401 inner wall of lower part admission chamber, and 42 inlet of tail pipe is internally provided with secondary anti-
Sand net 421.
Data acquisition and monitoring equipment 8 include be arranged on the first packer 46 the first packer state sensor 80,
The second packer state sensor 81 being arranged on the second packer 47, the third packer being arranged on third packer 48
State sensor 82, is arranged in 4, exploitation of gas hydrates well the bottom-hole transmitter 83 being arranged on 42 side wall of tail pipe
Monitoring device 85, frequency converter 86 and the power supply device 87 of extraordinary distributed temperature measuring optical fiber 84 and setting across the sea.Monitoring is set
Standby 85 respectively with the first packer state sensor 80, the second packer state sensor 81, third packer state sensor
82, bottom-hole transmitter 83 and extraordinary distributed temperature measuring optical fiber 84 are connected, and receive the measurement data and special type point of each sensor
The temperature measuring data of cloth temperature-measuring optical fiber 84, and display and data analysis are carried out to the data received, and then control frequency conversion
Device 86 adjusts 443 revolving speed of motor, realizes that liquid level automatic stabilisation is within a preset range in well.Power supply device 87 is used to be monitoring device
85, frequency converter 86 and drainage and step-down equipment 44 and the power supply of heating equipment 45 in exploitation of gas hydrates well 4.
In above-described embodiment, as shown in Fig. 2, centrifugal gas-liquid separator 442 includes the shaft 4421 being coaxially arranged, separation
Device inner tube 4422 and separator outer tube 4423, shaft 4421 are connected with motor 443, are arranged at intervals with gas on separator outer tube 4423
Body outlet.
In the various embodiments described above, heating equipment 45 uses electromagnetic heater.
In the various embodiments described above, as shown in figure 3, extraordinary distributed temperature measuring optical fiber 84 includes heating tape 841, bare fibre 842
And the protective case 843 outside heating tape 841 and bare fibre 842 is set, protective case 843 makes extraordinary distributed temperature measuring optical fiber
84 have preferable tension and wear-resisting property.Heating tape 841 includes copper conductor 844 and is closely set in outside copper conductor 844
Metal net 845.842 outer cover of bare fibre is equipped with stainless steel tube 846, and inside bare fibre 842 and stainless steel tube 846
Annular space is filled with ointment 847, for preventing steam intrusion optical fiber from fibre loss being caused to become larger and increase heat transfer property.
In the various embodiments described above, extraordinary distributed temperature measuring optical fiber 84, the bottom-hole transmitter cable for connecting bottom-hole transmitter 83
831, the sensor wire of each packer state sensor 80~82, connection drainage and step-down equipment 44 and heating equipment 45 are connected
Power cable 802 is fixed at 42 side wall of tail pipe, 43 outer wall of pot container and gas pipeline 40 by cable protection folder 801
On outer wall, and each sensor wire, extraordinary distributed temperature measuring optical fiber 84 and power cable 802 merge into combination cable 803 with
Monitoring device 85 is connected.
It is depressured quarrying apparatus based on above-mentioned Gas Hydrate In Sea Areas, the present invention also provides a kind of Gas Hydrate In Sea Areas
It is depressured recovery method, comprising the following steps:
1) controlling 44 discharge part liquid of precipitation row pressure equipment by data acquisition and monitoring equipment 8 reduces natural gas hydration
Liquid level in object recovery well 4 enters exploitation of gas hydrates well 4 after promoting gas hydrates layer to decompose.
441 discharge part liquid of centrifugal pump is controlled by data acquisition and monitoring equipment 8, reduces exploitation of gas hydrates
Liquid level in well 4: this is because the liquid level reserved in well after complete well is higher, the pressure condition of hydrate is in phase equilibrium line
Stable state drives 441 discharge part liquid of centrifugal pump to reduce liquid level in well by motor 443, and pressure reduction promotes natural gas
Hydrate layer decomposes, and the gas-liquid mixture after decomposition enters lower part admission chamber 401 by a sand control screens 4011, and passes through tail pipe
Secondary sand control screens 421 in 42 thoroughly avoid hydrate layer uplink of shaking out from destroying top device, while the first packer 46 can be with
Lower part admission chamber 401 and middle part gas-liquid separation chamber 402 is isolated, avoids the directly upper ease of the gas-liquid mixture decomposed.
2) gas-liquid mixture after being decomposed by 45 Duis of heating equipment heats, and divides in middle part gas-liquid separation chamber 402
From water and gas after separation respectively enter infusion pipeline 41 and gas pipeline 40, separate via top gas-liquid conveyor chamber 403 defeated
It is sent to gas-liquid processing equipment 7.
Electromagnetic heater heats the gas-liquid mixture after decomposition, while gas-liquid mixture is inside pot container 43
Uplink reaches packer 432 in tank, and gas-liquid mixture enters 11 outer wall annular space of pot container from tank skin through-hole 433, and goes upward to
Pot container is turned back downwards behind 43 top, and gas-liquid mixture carries out first separation, the gas-liquid mixed that residue is turned back during this
Object enters centrifugal gas-liquid separator 442 by 43 upper opening of pot container and carries out second of gas-liquid separation, and gas divides from gas-liquid
Be discharged from 442 outlet of device, be again introduced into 43 outer wall annular space of pot container, liquid from gas-liquid separator inner tube 4422 go upward to from
Heart pump 441, separative efficiency is up to 99%, it is possible to prevente effectively from influence of the gas to centrifugal pump 441, and it is also prevented from gas water
It closes object to regenerate in infusion pipeline 41, the water and gas after separation respectively enter infusion pipeline 41 and gas pipeline 40.
3) data acquisition and monitoring equipment 8 monitor temperature in hydrate recovery process in exploitation of gas hydrates well 4,
Pressure and fluid level condition, and 443 revolving speed of motor in drainage and step-down equipment 44 is controlled, so that in exploitation of gas hydrates well 4
Liquid level is maintained at preset height.
The temperature, pressure state of 83 real-time monitoring lower part admission chamber 403 of bottom-hole transmitter, passes through bottom-hole transmitter cable 831
It is sent to monitoring device 85；Temperature inside extraordinary 84 real-time monitoring exploitation of gas hydrates well 4 of distributed temperature measuring optical fiber becomes
Change and is sent to monitoring device 85；First packer state sensor 80, the second packer state sensor 81 and third packing
Device state sensor 82 distinguishes the state of first~third of real-time monitoring packer 46~48, and is sent to monitoring device 85；Prison
The temperature for controlling whole optical fiber that equipment 85 is obtained according to bottom-hole transmitter 83 and extraordinary distributed temperature measuring optical fiber 84 carries out data
Analysis obtains real-time level data, and controls frequency converter 86 by control algolithms such as PID, 443 revolving speed of motor is adjusted, to control
Pit shaft internal liquid level processed realizes that liquid level automatic stabilisation is in certain stable section in well, controls decomposition rate, avoid hydrops
It generates.Meanwhile according to the monitoring result of each packer state sensor 80~82, it is attached to monitor first~third packer 46~48
Close temperature, pressure condition avoids packer caused by over-pressure over-temperature from failing.
In addition, the heating function of extraordinary distributed temperature measuring optical fiber 84 can heat in entire exploitation of gas hydrates well 4
Portion thoroughly prevents regeneration of the natural gas hydrate inside pit shaft.
4) gas-liquid processing equipment 7 is discharged after handling recovered water and extraction gas.
The gas pipeline 40 of uplink enters further taking off for the extraction progress decomposition gas of Flash Gas Compression Skid System 72 after reaching sea 6
The processing such as water, desulfurization (decarburization), compression transport.The infusion pipeline 41 of uplink enters produced water treatment device after going upward to sea 6
A large amount of organic impurities difficult to degrade in 71 processing recovered waters, reach the standard that can be discharged, protect environment after processing.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each component, connection type and manufacture craft etc. are all
It can be varied, all equivalents and improvement carried out based on the technical solution of the present invention should not exclude
Except protection scope of the present invention.
Claims (9)
1. a kind of Gas Hydrate In Sea Areas is depressured quarrying apparatus, it is characterised in that: it includes exploitation of gas hydrates well, gas
Liquid processing equipment and data acquisition and monitoring equipment；The data acquisition and monitoring device are for monitoring simultaneously control production process
Described in liquid level, temperature, pressure condition and working condition in exploitation of gas hydrates well；
Exploitation of gas hydrates well upper end is connected with marine riser, be internally provided with gas pipeline, infusion pipeline, tail pipe with
And drainage and step-down equipment and heating equipment in pot container are set；After the gas pipeline upper end is pierced by by the marine riser
It is connected with the gas-liquid processing equipment；The infusion pipeline upper end is coaxially plugged in the gas pipeline lower end, by the gas transmission
Lower end of duct side wall enters exploitation of gas hydrates well inner cavity after stretching out, and by defeated in the marine riser bottom outer wall
Liquid pipeline outlet is connected after being pierced by with the gas-liquid processing equipment；The pot upper vessel portion is arranged under the infusion pipeline
Outer wall is held, the drainage and step-down equipment and heating equipment is respectively set in the pot container middle part and lower part, and the draining is dropped
Pressure equipment upper and lower end is connected with the infusion pipeline lower end and heating equipment respectively, the pot container bottom and the tail pipe
Upper end is connected；
The drainage and step-down equipment includes sequentially connected centrifugal pump, centrifugal gas-liquid separator and motor, on the centrifugal pump
End is connected to the infusion pipeline lower end, and the motor is connected with the heating equipment.
2. a kind of Gas Hydrate In Sea Areas as described in claim 1 is depressured quarrying apparatus, it is characterised in that: the natural gas
The pot container bottom and the tail pipe connecting place are provided with the first packer, the gas pipeline inside hydrate recovery well
The second packer is set with the infusion pipeline intersection, is internally provided at the infusion pipeline outlet of the water proof bottom of the tube
Third packer, outside setting preventer；Bottom is between first packer in the exploitation of gas hydrates well
Lower part admission chamber is middle part gas-liquid separation chamber, second packer between first packer and second packer
It is gas-liquid conveyor chamber in top between the third packer, is marine riser annular space above the third packer.
3. a kind of Gas Hydrate In Sea Areas as claimed in claim 2 is depressured quarrying apparatus, it is characterised in that: the data are adopted
Collection and monitoring device include the first packer state sensor being arranged on first packer, are arranged in second envelope
Every on device the second packer state sensor, be arranged on the third packer third packer state sensor, set
It sets in the bottom-hole transmitter on the tail pipe side wall, the extraordinary distributed temperature measuring that is arranged in the exploitation of gas hydrates well
Monitoring device, frequency converter and the power supply device of optical fiber and setting across the sea；
The monitoring device is insulated with the first packer state sensor, the second packer state sensor, third respectively
Device state sensor, bottom-hole transmitter and extraordinary distributed temperature measuring optical fiber are connected, receive each sensor measurement data and
The temperature measuring data of the special type distributed temperature measuring optical fiber, and display and data analysis are carried out to the data received, in turn
It controls the frequency converter and realizes that liquid level automatic stabilisation is within a preset range in well；The power supply device is the monitoring device and change
Frequency device and drainage and step-down equipment and heating equipment power supply in the exploitation of gas hydrates well.
4. a kind of Gas Hydrate In Sea Areas as claimed in claim 3 is depressured quarrying apparatus, it is characterised in that: described extraordinary point
Cloth temperature-measuring optical fiber includes spaced heating tape, bare fibre and the protection being arranged in outside the heating tape and bare fibre
Set；
The metal net that the heating tape includes copper conductor and is closely set in outside the copper conductor；
The bare fibre outer cover is equipped with stainless steel tube, and the bare fibre and the annular space filling inside the stainless steel tube are useful
In the ointment for preventing steam intrusion optical fiber from fibre loss being caused to become larger and increase heat transfer property.
5. a kind of Gas Hydrate In Sea Areas as described in claim 1 is depressured quarrying apparatus, it is characterised in that: the pot is held
Device top is fixed on the outer wall of the infusion pipeline lower part by pot container connection strap；Setting in the middle part of the pot container
There is packer in tank, and is provided with multiple tank skin through-holes on the pot container side wall of packer lower part in the tank.
6. a kind of Gas Hydrate In Sea Areas as described in claim 1 is depressured quarrying apparatus, it is characterised in that: described centrifugal
Gas-liquid separator includes the shaft being coaxially arranged, separator inner tube and separator outer tube, and the shaft is connected with the motor, institute
It states and is arranged at intervals with gas discharge outlet on separator outer tube.
7. a kind of Gas Hydrate In Sea Areas as described in claim 1 is depressured quarrying apparatus, it is characterised in that: the heating is set
It is standby to use electromagnetic heater.
8. a kind of Gas Hydrate In Sea Areas as described in claim 1 is depressured quarrying apparatus, it is characterised in that: at the gas-liquid
Reason equipment includes produced water treatment device and extraction Flash Gas Compression Skid System, the produced water treatment device and the infusion pipeline upper end
It is connected, the extraction Flash Gas Compression Skid System is connected with the gas pipeline upper end.
9. a kind of Gas Hydrate In Sea Areas based on device as described in claim 1 is depressured recovery method, it is characterised in that packet
Include following steps:
1) controlling precipitation row pressure equipment discharge part liquid by data acquisition and monitoring equipment reduces exploitation of gas hydrates
Liquid level in well enters exploitation of gas hydrates well after promoting gas hydrates layer to decompose；
2) air-water mixture for entering exploitation of gas hydrates bottom is heated by heating equipment, feeds them into tank
Gas-liquid separation is carried out in type container, the water and gas after separation respectively enter infusion pipeline and gas pipeline, and then are transported to gas
Liquid processing equipment；
3) temperature, pressure and the liquid level shape in data acquisition and monitoring equipment monitoring hydrate recovery process in hydrate recovery well
State, and drainage and step-down equipment is controlled, so that liquid level is maintained at preset height in hydrate recovery well；
4) gas-liquid processing equipment is discharged after handling recovered water and extraction gas.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711009912.5A CN107795302B (en) | 2017-10-25 | 2017-10-25 | A kind of Gas Hydrate In Sea Areas decompression quarrying apparatus and its recovery method |
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| CN201711009912.5A CN107795302B (en) | 2017-10-25 | 2017-10-25 | A kind of Gas Hydrate In Sea Areas decompression quarrying apparatus and its recovery method |
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| CN107795302A CN107795302A (en) | 2018-03-13 |
| CN107795302B true CN107795302B (en) | 2019-11-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111119799A (en) * | 2020-01-21 | 2020-05-08 | 中国石油大学(华东) | Natural gas hydrate exploitation device and method |
| CN112253057B (en) * | 2020-10-09 | 2021-08-10 | 青岛海洋地质研究所 | Efficient exploitation method of pore filling type natural gas hydrate |
| CN112282707B (en) * | 2020-12-18 | 2021-11-19 | 福州大学 | Sea natural gas hydrate barrel type mining device and method thereof |
| CN112343557B (en) * | 2020-12-18 | 2021-11-23 | 福州大学 | Sea area natural gas hydrate self-entry type exploitation device and exploitation method |
| CN114991741A (en) * | 2022-05-16 | 2022-09-02 | 东北石油大学 | Natural gas hydrate separation device and method |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant after: CHINA NATIONAL OFFSHORE OIL Corp. Applicant after: CNOOC RESEARCH INSTITUTE Co.,Ltd. Applicant after: CHINA University OF PETROLEUM (EAST CHINA) Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant before: CHINA NATIONAL OFFSHORE OIL Corp. Applicant before: CNOOC Research Institute Applicant before: CHINA University OF PETROLEUM (EAST CHINA) |
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Effective date of registration: 20221111 Address after: 100010 No. 25 North Main Street, Dongcheng District, Beijing, Chaoyangmen Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Patentee after: CNOOC RESEARCH INSTITUTE Co.,Ltd. Address before: 100010 No. 25 North Main Street, Dongcheng District, Beijing, Chaoyangmen Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Patentee before: CNOOC RESEARCH INSTITUTE Co.,Ltd. Patentee before: CHINA University OF PETROLEUM (EAST CHINA) |